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EP 0445446 B1 19940119 - Purification of crude isophthalic acid.

Title (en)

Purification of crude isophthalic acid.

Title (de)

Reinigung von roher Isophthalsäure.

Title (fr)

Purification d'acide isophtalique brut.

Publication

EP 0445446 B1 19940119

Application

EP 90302349 A 19900306

Priority

US 25751188 A 19881013
US 41965689 A 19891011

Abstract (en)

[origin: EP0445446A1] Solutions of crude isophthalic acid are purified by hydrogenation in the presence of a catalyst comprising two Group VIII noble metal-containing components.

IPC 1-7

C07C 63/24; C07C 51/487

IPC 8 full level

C07C 51/487 (2006.01)

CPC (source: EP US)

C07C 51/487 (2013.01 - EP US)

Citation (examination)

EP 0265137 A2 19880427 - MITSUI PETROCHEMICAL IND [JP]

Designated contracting state (EPC)

BE DE ES FR GB IT NL

DOCDB simple family (publication)

US 4933492 A 19900612; AU 5075990 A 19910912; AU 618882 B2 19920109; EP 0445446 A1 19910911; EP 0445446 B1 19940119; ES 2048427 T3 19940316

DOCDB simple family (application)

US 41965689 A 19891011; AU 5075990 A 19900306; EP 90302349 A 19900306; ES 90302349 T 19900306